Member reducing buckling lengths:
for buckling in system surface, it is accepted the joint deformabilitys (*wgPN determined by annexe 1 to national standard*|*determined by mechanic principles*), (*wgPN coefficient y calculated as to member (*T00U loose*|*(*T11U unilaterally*|*bilaterally*) fixed in system (*PNpU movable*|*immovable*)*)
from formula (Z1) lo = y yo l, l = $LoU$ m, it is accepted yo = $Psiou$,
joint deformabilitys: ka =$kappAU$ Þ kA =(1/ka-1)=$kapAU$, kb =$kappBU$ Þ kB =(1/kb-1)=$kapBU$,
(*T00U y = 1,000 Þ lo = $WpsiU$×$Psiou$×$LoU$ = $LwU$ m*|*(*T11U (*PNpU Þ y = 2 + 1/(3kw) = 2 + 1/(3×$kapWU$)*|*y = 0,7 + 1/(3 kw+3) = 0,7 + 1/(3×$kapWU$ + 3) *)*|*(*PNpU y = 1 + 1/(5kwA+1) + 1/(5kwB+1) + 0,2/(kwA+kwB) = 1 + 1/(5×$kapAU$ + 1) + 1/(5×$kapBU$ + 1) + 0,2/($kapAU$ + $kapBU$)*|* y = 0,5 + 0,25/(kwA+1) + 0,25/(kwB+1) = 0,5 + 0,25/($kapAU$ + 1) + 0,5 + 0,25/($kapAU$ + 1)*) = $WpsiU$*) Þ lo= $WpsiU$×$Psiou$×$LoU$ = $LwU$ m*)*|*
joint deformabilitys: ka=$kapAU$, kb=$kapBU$, kv=$kapVU$, Þ m = $WpsiU$, dla l = $LoU$, lo= m l = $WpsiU$×$LoU$ = $LwU$ m*)
for buckling in surface perpendicular to system surface, it is accepted the joint deformabilitys (*wgPN determined by annexe 1 to national standard*|* determined by mechanic principles*), (*wgPN coefficient y calculated as to member (*T00P loose*|*(*T11P nilaterally*|*bilaterally*) fixed in system (*PNpP movable*|*immovable*)*):
from formula (Z1) lo = y yo l, l = $LoP$ m, it is accepted yo = $Psiop$,
joint deformabilirys: ka =$kappAP$ Þ kA =(1/ka -1)=$kapAP$, kb =$kappBP$ Þ kB =(1/kb-1)=$kapBP$,
(*T00P y = 1,000 Þ lo = $WpsiP$×$Psiop$×$LoP$ = $LwP$ m*|*(*T11P (*PNpP Þ y = 2 + 1/(3kw) = 2 + 1/(3×$kapWP$)*|*y = 0,7 + 1/(3kw+3) = 0,7 + 1/(3×$kapWP$ + 3) *)*|*(*PNpP y = 1 + 1/(5kwA+1) + 1/(5kwB +1) + 0,2/(kwA+kwB) = 1 + 1/(5×$kapAP$ + 1) + 1/(5×$kapBP$ + 1) + 0,2/($kapAP$ + $kapBP$)*|* y = 0,5 + 0,25/(kwA+1) + 0,25/(kwB+1) = 0,5 + 0,25/($kapAP$ + 1) + 0,5 + 0,25/($kapAP$ + 1)*) = $WpsiP$*) Þ lo= $WpsiP$×$Psiop$×$LoP$ = $LwP$ m*)*|*
joint deformabilitys: ka=$kapAP$, kb=$kapBP$, kv=$kapVP$, Þ m = $WpsiP$, dla l = $LoP$, lo= m l = $WpsiP$×$LoP$ = $LwP$ m*)
misiak10-1985